Employee Benefit Plans (Detail Textuals) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Defined Benefit Plan Disclosure [Line Items]
Estimated amounts to be amortized from AOCI into net periodic benefit costs	$ 0.1
Matching contribution made by the company	22.8	$ 16.5	$ 16.4
Employee deferrals and matching contributions, net	2.0	3.1
Expenses included in continuing operations for the matching contributions	0.1	0.3
Accrued balances of deferred retirement salary plan	1.9	1.5
Total expenses (income) included in continuing operations for the deferred retirement salary plan	0.4	0.2
Other non-current liabilities
Defined Benefit Plan Disclosure [Line Items]
Employee deferrals and matching contributions, net	5.4	5.7
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Voluntary funding contribution	1.8	1.4
Estimate future contribution in 2019	0.3
Deferred actuarial losses recognized as expense	9.2
Non-U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Voluntary funding contribution	1.8	$ 1.2
Deferred actuarial gains recognized as income	$ 3.5
Percentage of asset allocation in money market investments	100.00%